LOS ANGELES (AP) When Southern California offensive coordinator Tee Martin told incoming freshman Amon-Ra St. Brown to learn all three wide receiver positions, it was intended for his future development.

St. Brown would stay at one spot in his first season, the same approach Martin used successfully with former Trojan stars Nelson Agholor and JuJu Smith-Schuster as freshmen.

Martin never expected St. Brown to be so advanced that he would capable of playing in the slot or outside, let alone emerge as a main option in the passing game for USC with 50 receptions for 656 yards, both team highs.